Solution #3: Left arrow goes back, swipe causes history to display

The obvious third option is that the back button behaves like every other browser, and goes back one page, while the lesser used "view history" is tied to the left-to-right flick gesture. This is what I assumed it would be when I first used it, and was suprised to find the back button did not just go back one page, like it does for literally every other browser in the world.